Oil burner



Dec. 31, 1929. F, HENNEBHLE 1,741,364

OIL BURNER Filed Aug. 26. 1926 ATTORNEY Patented Dec. 31, 1929 FRANKHENNEHLE, oF o-HIcAGlo, iiiI-.INors oir 'nennen Mendelian. :mailinglistae, 192e. serial No. 131,709.

The invention vgenerally relates to oil burners of the type disclosed inmy Patent No. 1,555,855 issued October 6, 1925, and primarily has forits object -to provide certain new and useful improvements in the burnerdisclosed in the patent referred to whereby a more even and eflicientdistribution of 'the oil film, a more perfect combustion and "e moreefficient flame distribution is provided for than is possible in thepatented structure referred to or in the disclosures of the prior art.

In its more detailed nature the invention seeks to improve the burnerdisclosed in Pat ent No. 1,555,855 by providing an oil feed tube adaptedto lie in the uppermost oil groove and having fineorifices through whichDil is delivered into the said groove to assure more even distributionof the oil film,v an annular heated air passageway for effecting a' moreefficient preheating of the oil in the oil grooves and to overcometendency of the incoming air to chill said oil grooves, and a spreaderring for more efliciently spreading the flame produced by combustion.

l/Vith the above and other objects in view that will hereinafter` appearthe'inventi'on further resides in the novel details of con- Astruction,combinationand arrangement of parts, all of which will be Ifirst fullydescribed, then be particularly pointedvo-ut in the appended claims,reference being had to the accompanying drawing in which z-f Y Figure 1is a central vertical cross section illustrating the invention.

VI*"1 fg"ure 2 is a plan view, vthe spreader ring l being removed.` f

Figure 3 is an inverted perspective view of the oil .feed tube. i i

In the drawing in which like numeralsof reference indicate like parts inall of the figures, 1 represents :the lbase portion vof the burner whichiis provided with an upright peripheral flange The burner may be hookbolted as at 3 vto the particular grate structure 4 upon which it is tobe mounted. The base is ,provided `with a depending flange 5 which isadapted to yengage the grate so as yto provide an air spaceabovethegrate surrounded by said flange. When the burner is secured yon thegrate the space surrounding it is covered with fire clay to assureinduction of draft upwardly through the burner only as described andshown in my Patent No. 1,555,855.

A frusto-coniform throat 6 extends upwardly from the base `1 merges witha cylindrical neck 7 which v'extends up into, but terminates short of,the top 'of the crown cap 8, removably 'supported upon the 'neck 7 bythe mounting ring 9 spaced from 'the said cap the web`s`10. s

In my present invention the outer "face lof the frusto-coniform throat 6is smooth and a frusto-coniform sleeve 11 is 'fitted v'over it and heldin spaced relation by the vribs 12 which engage the outer surface of thesaid throat. Thus a well delinednannular air passage 13 is providedbetween the oute'rsurface of the throat 6 and the sleeve, the purposefor which will be described later. i u

The crown cap 8 is 'curved downwardly to surround the upper edge of thesleeve 1 1 and provide an annular restricted discharge throatway 14adapted to discharge onto the outer surface vof the said sleeve.

Thus the draft air kpassing up through .the grate 4 will pass throughthethroatway '6 and neck 7 and be directed against the top of the crownca`p8 and deflected downwardly through the Vrestricted dischargelthroatway 14 against the outer Isurface of the sleeve 11.

The outer surface of the sleeve 111s pro.- vided with a p'l'uralityofstepped or terraced annular oil grooves 15, the low'ermosty one of whichdischarges into an overflowgroove 516 in event of failure of combustion..A drain 17 communicates with the groove `1'6 and as the purpose voflthisdrain is fullydisclosed in my patent lhereinbefore .referredto,4'ffu'r ther description :here isffde'emed unnecessary.

A ring-like fuel oil distributingtube-18 is vloosely laid winto Itheuppermost loil -jgroove 15 and has its extremities bent downwardly atright angles as at 19 `and projected into receiving pockets 2O .formedin the sleevef11 and communicating with the fuel delivery duct 21; AFueloil issupplied to the duct 21 bythe fuel deliverypipe Q2 which isscrewed into` the boss 23 with which lthe sleeve `11 is provided. Thetube 18 is provided with a plurality of fuel distributing orificesfzadirected downwardly into the uppermost oil groove 15.

The frusto-coniform throat 6 is provided with a suitable cut-out portion25 to accommodate the boss 23 of the sleeve 11.

The ends of the angle portions 19 may be upset slightly as at 26 ifdesired to prevent inadvertent removal of the tube 18.

In orperation, fuel oil is evenly distributed in the uppermost oilgroove 15 through the orifices of the tube 18 and this groove,overflowing, provides and assures the fiow of a uniform thin film of oildown the grooved outer surface of the-sleeve 11. By providing thedistributing tube 18 amore uniform film of fuel oil is provided and moreefficient coinbustion is assured than is possible in my patentedstructure referred to.. As the crown cap 8 becomes highly heated thedraft air directed against the top thereof will be preheated and sodirected against the thin film of oil as to effectively act to vaporizethe same and greatly aid in providing foreffcient combustion.

The crown cap 8 is provided with an annular flange 27 for supporting thedeflecting ring 28 which serves to spread and deflect the flameoutwardly over a greater area than it would cover under ordinarycircumstances.

By providing the annular air passage 13 between the throat 6 and sleeve11, means is provided for shielding the said sleeve against any coolingtendency occasioned by passage of draft air up through the said throat6. Heated air is directed into that passage 13 from the crown cap andserves not only to insulate the sleeve 11 from the relatively7 coolair-contacted throat 6, but also to heat the said sleeve-and furthercontribute to the ready vaporization of the oil film and more perfectcombustion.

F rom the foregoing description, taken in connection with theaccompanying drawing, it is thought that the novel details ofconstruction, the manner of use and the advantages of the invention willbe readily apparent to those skilled in the art to which it relates.

'What I claim is: l

1. A device of the'class described comprising a base, a frusto-eoiiiformthroateX- tendingupwardly fromthe base, a neck eX- tending upwardly fromthev throat and forming a restricted -air duct, aheating and expandinglcrown'cap surrounding the neck and into which the'neckdischarges andwhich has the edge thereof extended to surround the neck' and form arestricted annular discharge passage .discharging 'onto the outersurface of the said throat, a frusto-coniform sleeve surrounding saidthroat in spaced relation `and in position for having the dischargepassage discharge onto the outer surface thereof and into the spacebetween said throat and sleeve, and means for distributing a film offuel oil onto the outer surface of said sleeve.

2. A device of the class described comprising a base, a frusto-coniformthroat eX- tending upwardly from the base, a neck extending upwardlyfrom the throat and forming a restricted air duct, a heating and eX-panding crown cap surrounding the neck and into which the neckdischargesand which has the edge thereof extended to surround the'neck and form arestricted annular discharge passage Vdischarging onto the outer surfaceof the said throat, a frus'to-coniform sleevesurrounding said throatinspaced relation and in position for having the discharge passagedischarge onto the outer surface thereof and into the space between saidthroat and sleeve, said sleeve having a plurality of annular stepped oilgrooves, oil distributor tube mounted inthe uppermost oil groove andprovided with a plurality of distributor orifices directed into saidgroove, and means for supplying fuel oil to said tube.

3.' A device of the class described comprisinga base, a frusto-coniformthroat extending upwardly from the base, and having a series ofrelatively shallow annularly stepped oil grooves in the outer surfacethereof, a neck extending upwardly from the throat and forming arestricted duct, a cap supported by the neck and into which the neckdischarges and having its topspaced above but inV close relation to saidneck and the edge thereof positioned to provide a restricted annular airdischarge throat-way surrounding tlie outer surface of thefrustocoiiiform throat, and an oil distributor tube A mounted in theuppermost oil groove and provided with a plurality of equi-distantlyspaced distributor orifices directed downwardly into the said uppermostgroove, and

means tov direct fuel oil upwardly into the tube.

4. A device of the class described comprising a base, a frusto-coniformthroat extending upwardly from the base, a neck extendingupwardly fromthe throat and forming a restricted air duct, a heating and expandingcrown cap surrounding the neck and into which the neck discharges andwhich has the edge thereof extended to surround `the neck and formarestricted annular diswebs supporting the mounting ring in the crowncap, said webs being adapted to rest upon the frusto-coniform sleeve tosupport said crown cap.

5. In a device of the class described, a base, a frusto-coniform throatextending upwardly from the base and having a neck extending upwardlyfrom said throat to form a restricted air duct, a crown cap having a topand a constricted throat and'means to support said cap on said neck,said cap having a narrow annular flange surroun ing the body below thelevel of the top thereof, and a spreader ring removably fitted over saidcap and yresting on said flange, substantially as described.

6. In a device of the class described, a base, a frusto-coniform throatextending upwardly from the base, and a cap over the throat having adischarge passage; a frustoconiform sleeve surrounding said throat inspaced relation and in position for having the discharge passagedischarge onto the outer surface thereof and into the space between saidthroat and sleeve, said sleeve having a plurality of annular stepped oilgrooves, an oil distributor tube mounted in the uppermost oil groove andprovided with a. plurality of distributor orifices directed into saidgroove, means for supplying fuel oil to said tube, said fuel oilsupplying means including a delivery pipe extending upwardly through thefrusto-coniform throat, said throat having fuel oil 'distributing andtube end receiving pockets in com-v munication with the delivery pipe,and said tube having its ends adjacent and bent angularly and insertedin the receiving pockets tov receive fuel oil and secured againstinadvertent removal.

7. In a burner of the class described, a base, a neck extending upwardlyfrom the base to constitute an air passageway, means for supplying fueloil to said base around said neck, a sleeve surrounding said neck, meansto hold said sleeve in spaced relation to said neck, and means forheating the air passing out of said passageway and delivering the heatedair over the outer surface of said sleeve and into the top of the spacebetween said sleeve and neck whereby a portion ofthe heated air willpass downwardly into said space for the purposes specified.

8. In a burner of the class described, a base, a neck extending-upwardlyfrom the base to constitute an air passageway, means for supplying fueloil to said base around said neck, a sleeve surrounding said neck, meansto hold said sleeve spaced from said neck to provide an air passagewaybetween the neck and sleeve, a cap supported over said neck and havingair baffling surfaces for directing the air passing into the cap fromsaid first mentioned passageway over the outer surface of said sleeveand into the top of the air passageway which is located between saidsleeve and said neck, said cap being located in the flame zone of theburner to become heated and thereby heat the air before delivering itover the outer surface of said sleeve and into said passageway betweensaid sleeve and said neck.

FRANK HENNEBHLE

